function startCourse()
{
	// check to see if cookies is enabled, otherwise, this won't work
	if( typeof sessionStorage === "undefined" || sessionStorage.disabled )
	{
		alert( "You must enable cookies for this course to work properly." );
	}
	else
	{
		// if it is enabled, checked to see if this course was started
		// if it was not able to retrieve, the key "course_started", then
		// then this is the first time we are running the course
        if( !sessionStorage.getItem( "course_started" ) )
        {
        	// clear the session storage
            sessionStorage.clear();
            // set the "key" by giving it a value.  all values are strings!
    		sessionStorage.setItem( "course_started", "1" );
    		sessionStorage.setItem( "index", "0" );
    		sessionStorage.setItem( "france", "0" );
    		sessionStorage.setItem( "gambia", "0" );
    		sessionStorage.setItem( "sudan", "0" );
    		sessionStorage.setItem( "uae", "0" );
    		sessionStorage.setItem( "quiz", "0" );
    		
        }
	}
}


function visitHome()
{
	sessionStorage.setItem( "home", "visited" );
	showQuiz();
}
function visitFrance()
{
	sessionStorage.setItem( "france", "visited" );
	showQuiz();
}
function visitGambia()
{
	sessionStorage.setItem( "gambia", "visited" );
	showQuiz();
}
function visitSudan()
{
	sessionStorage.setItem( "sudan", "visited" );
	showQuiz();
}

function visitUAE()
{
	sessionStorage.setItem( "uae", "visited" );
	showQuiz();
}





// this function will check to see if every page was visited
// if so, show the Quiz link
function showQuiz()
{
	var homeVisited = sessionStorage.getItem( "home" );
	var franceVisited = sessionStorage.getItem( "france" );
	var gambiaVisited = sessionStorage.getItem( "gambia" );
	var sudanVisited = sessionStorage.getItem( "sudan" );
	var uaeVisited = sessionStorage.getItem( "uae" );
	
	if( homeVisited == "visited" && franceVisited == "visited" && gambiaVisited == "visited" && sudanVisited == "visited" && 
		uaeVisited == "visited" )
	{
		document.getElementById( "quiz-link" ).style.display = "inline";
	}
	
}









